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module src.primitives.impl;
import std.stdio;
import src.stack;
import src.definition;
int[string] variables;
bool drop_mode;
bool definition_start() {
src.definition.start;
return true;
}
bool binary_op_variable_bind() {
string name = stack.pop.get!string;
int value = stack.pop.get!int;
variables[name] = value;
return true;
}
bool unary_op_variable_resolve() {
string name = stack.pop.get!string;
if ( name in variables ) {
stack.push(variables[name]);
}
return true;
}
bool conditional_start() {
switch ( stack.pop.get!int ) {
case 0:
drop_mode = true;
return true;
case 1:
drop_mode = false;
return true;
default:
throw new Exception("invalid logic value");
}
}
bool conditional_end() {
drop_mode = false;
return true;
}
bool binary_op_add() {
int b = stack.pop.get!int;
int a = stack.pop.get!int;
stack.push(a + b);
return true;
}
bool binary_op_multiply() {
int b = stack.pop.get!int;
int a = stack.pop.get!int;
stack.push(a * b);
return true;
}
bool binary_op_divide() {
int b = stack.pop.get!int;
int a = stack.pop.get!int;
if ( b == 0 ) {
throw new Exception("division by 0 undefined");
} else {
stack.push(a / b);
}
return true;
}
bool binary_op_modulo() {
int b = stack.pop.get!int;
int a = stack.pop.get!int;
if ( b == 0 ) {
throw new Exception("modulo 0 undefined");
} else {
stack.push(a % b);
}
return true;
}
bool unary_op_io_print() {
writeln(stack.top);
return true;
}
bool unary_op_stack_pop() {
stack.pop;
return true;
}
bool unary_op_stack_dup() {
stack.push(stack.top);
return true;
}
bool binary_op_stack_swp() {
auto b = stack.pop;
auto a = stack.pop;
stack.push(b);
stack.push(a);
return true;
}
bool binary_cond_lt() {
int b = stack.pop.get!int;
int a = stack.pop.get!int;
stack.push(a < b);
return true;
}
bool binary_cond_eq() {
int b = stack.pop.get!int;
int a = stack.pop.get!int;
stack.push(a == b);
return true;
}
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